The reasons for engineering changes in the construction stage are complex and have poor regularity. The engineering change cost of some projects is much higher than the original contract amount, and the disputes between the owner and the contractor caused by the engineering change are also constant, which makes it more difficult to control the engineering cost. It can be seen that effective management of engineering changes to ensure the construction quality and progress is an important work content of the construction unit, and the engineering change management procedure has also become an essential procedure in the construction process. How to establish engineering change management procedures should do the following work. 1 correctly understand the purpose of establishing engineering change management procedures. The purpose of establishing engineering change management procedure is to strengthen the management of design change and site visa, standardize work flow, effectively control engineering cost and ensure engineering quality and progress. 2. Define the applicable scope of engineering change management procedures. Engineering change management procedures are applicable to all engineering changes within the scope of construction projects, including those that affect the engineering cost and those that do not. Engineering changes include design changes and on-site visas. 3. Clarify the responsibilities during the execution of engineering change management procedures. Construction units, supervision units, engineering cost consulting units, contractors and other relevant departments and personnel are responsible for the implementation of this management procedure. 4. Implementation principle of establishing engineering change management procedures 1) Step-by-step examination and approval principle: the construction unit implements step-by-step examination and approval of engineering change management, and personnel at all levels examine and approve the suggestions and schemes put forward by the change according to the management procedures and authority. 2) Principle of timeliness: In principle, the relevant responsible departments of the construction unit should fill in and submit for approval before the change is implemented, and ask for instructions orally in case of emergency on site. According to the actual situation of the construction project, it is determined that the supervision unit should resubmit the application for change within a few working days after the change is implemented. 3) Confirmation principle of completion measurement: After the work involved in the engineering change order is completed, the engineer of the responsible department of the construction unit and the supervision unit will confirm the completion. For concealed works, in principle, the cost engineer of the cost consulting department should be brought to witness or provide images, records and other information to the cost engineer within one week afterwards. For the part that can't attend the on-site witness, the cost engineer shall clearly submit the confirmation data of completion measurement for future reference. 4) Principle of single item calculation: In principle, an engineering change budget should be prepared for an engineering change instruction, corresponding to an engineering contract. If the change order is a visa or record that does not affect the cost, there is no need to prepare a budget. 5) 1 month 1 day principle: at the beginning of each month, the supervision unit shall prepare the project budget and budget summary table for the design changes and site visas completed before 25th of last month, and report them to the project cost control department of the construction unit for the record. 6) Original settlement principle: the settlement of engineering changes should be based on complete and effective originals. If there is no original, the undertaker shall affix the official seal of the undertaker on the copy, and the undertaker shall be responsible for the validity of the copy. 7) Standard format principle: All engineering changes must use the specified standard format. 5 Examination and approval authority of engineering change control In order to ensure that the control of engineering change does not affect the implementation of the whole project, examination and approval authority can be set for engineering change control. For example, the engineering manager can apply for direct approval of the estimated cost within 20,000 yuan (including 20,000 yuan) for each engineering change order. This part of the construction unit can set the examination and approval authority according to the organization. 6. Management Procedure of Engineering Change 6. 1 Contents of Engineering Change 6. 1 Design Change 1) If the design unit finds that the design drawings are wrong, missing, broken or missing, the design unit shall propose practice change, material substitution or other changes; 2) The functional department of the construction unit found design errors, omissions and improvement of the use function of the construction project, and the construction unit proposed to change the construction standards, structural functions, use functions and increase or decrease the project content, resulting in changes in practices, material substitution or other changes; 3) If the supervision unit finds problems in the design or puts forward reasonable suggestions in the implementation of supervision activities, the supervision unit will propose to the construction unit the adoption of new technologies, new materials or other technical measures, which will lead to changes in practices, material substitution or other changes; 4) The contractor found design problems or put forward reasonable suggestions in the construction process, and proposed to the supervision unit and the construction unit to adopt new technologies, new materials or other technical measures, resulting in changes in practices, material substitution or other changes. 6. 1.2 site visa 1) The constructed part needs to be demolished due to design changes; 2) Deal with various technical measures cancelled outside the contract or during construction; 3) In the process of construction, due to the change of construction conditions and underground conditions, increase or decrease the engineering quantity, change materials or make other changes; 4) Work items to be measured according to the contract. 6.2 General process of engineering change 1) All engineering changes must be uniformly filled in by the supervision engineer according to the written application of the proposer, and the engineering change instruction application form designated by the construction unit is used for the internal application of engineering change. 2) The supervision engineer shall submit an application form for engineering change instruction to the relevant responsible department of the construction unit. After the cost engineer of the engineering cost consulting unit (or the construction unit) evaluates the cost estimate in the application form submitted by the supervision engineer, the leaders at all levels of the construction unit will sign and approve it step by step according to the examination and approval authority. After the application form is approved, the chief supervision engineer will issue the engineering change instruction. 3) After the work involved in the engineering change order is completed, the supervision engineer shall organize the contractor and the relevant responsible department of the construction unit to make measurement confirmation, and notify the cost audit unit or the audit department of the construction unit at the same time. The supervision unit shall fill in the completion confirmation form of the engineering change order and submit it to the responsible department of the construction unit for confirmation. 4) The supervision unit shall prepare the project change budget according to each completion confirmation form and submit it to the cost control department of the construction unit. 6.3 Requirements for filling in engineering change orders, etc. 1) Design changes proposed by the construction unit must be signed by the manager of the responsible department of the construction unit and reported to the supervision unit. 2) The supervision engineer is responsible for uniformly numbering the engineering change order application form, engineering change order and engineering change order completion confirmation form, and filing them for safekeeping; Each party shall establish the delivery record of the documents related to the engineering change, that is, when delivering the other party's documents, the other party is required to sign for it, and the receiving party shall not refuse to sign for it. 3) The managers of all departments of the construction unit are responsible for examining and approving the application form for engineering change instructions. If it involves responsibilities outside the department, it needs to be countersigned by the relevant department. 4) The contents of the engineering change order shall be consistent with the contents of the approved engineering change order application form, and the contractor shall implement it according to the engineering change order. 5) The supervision engineer shall cooperate with the relevant personnel of the construction unit to confirm the corresponding quantities in the completion confirmation form of the engineering change order. 6) After the on-site visa is completed, the supervision engineer shall communicate with the relevant personnel of the construction unit in time when filling in the confirmation form of engineering change instructions, and must sign the completed or unfinished facts or quantities, materials and specifications, number of working days, number of mechanical shifts, etc. In principle, the site management personnel of the construction unit should not directly sign the relevant unit price or total price on the visa. 7) The completion confirmation form of all engineering change orders must be signed by the chief supervision engineer, the person in charge of the contractor and the manager of the corresponding responsible department of the construction unit, and stamped with the official seal of the supervision unit and the official seal of the contractor. In principle, the contents of the confirmation form for completion of engineering change orders should be consistent with the scope of corresponding engineering change orders. 8) The supervision engineer and the site management personnel of the construction unit shall track and implement the unfinished work within the scope agreed in the contract, form a written record with the contractor, and issue the engineering change instruction in time to prevent omission or misstatement. 9) The leaders at all levels of the construction unit shall sign and approve according to the examination and approval authority, and confirm the completion of the examination and approval. 10) If the contract clearly stipulates that it is necessary to confirm the settlement unit price, the unit price shall include management fees, profits and taxes. 1 1) The cost estimate for the supervision engineer to fill in the engineering change instruction application form shall include all expenses and taxes. 12) The supervision engineer shall fill in the construction time, work content, reasons, quantities, working days, mechanical shifts and accessories of the changed project in detail and clearly. 13) Before the supervision engineer fills in the application form of engineering change instruction, he can ask the construction unit's cost engineer and cost consulting unit for their opinions on the understanding and explanation of the contract. 14) The responsible department of the supervision and construction unit shall be responsible for the authenticity and accuracy of the contents signed on the visa form. 15) Format requirements of engineering change budget. Engineering change instruction budget: the budget cover should include the project name, contract number, engineering change instruction number and completion confirmation number, with the original engineering change instruction, the original completion confirmation form of engineering change instruction, all correspondence related to engineering change (if any, for reference), the comprehensive unit price of the same work content in the construction contract and the calculation rate of related expenses. When the contract is missing, a comprehensive unit price analysis table, a charging table and a material adjustment basis shall be attached; If the quota is not implemented, the quantity analysis table and other cost-related issues that need to be explained should be attached. 6.4 Provisions on the processing time of engineering change 1) The general application form for engineering change instruction shall be signed and approved by the construction unit (including oral approval), and the chief supervision engineer of the supervision unit shall issue the engineering change instruction to the contractor, and the contractor shall implement it according to the received engineering change instruction. 2) The supervision engineer and the relevant personnel of the construction unit shall confirm the completion survey within 5 working days after the completion of the engineering change order, and fill in the completion confirmation form.
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